刈割时间(Cutting time CT)和晾晒时间(Drying time DT)是影响干草品质的主要因素,收获期的研究已经取得长足进展,刈割时间和晾晒时间对天然牧草干草品质的影响还是空白,研究刈割时间和晾晒时间对天然牧草干草品质的影响,确定适宜刈割...刈割时间(Cutting time CT)和晾晒时间(Drying time DT)是影响干草品质的主要因素,收获期的研究已经取得长足进展,刈割时间和晾晒时间对天然牧草干草品质的影响还是空白,研究刈割时间和晾晒时间对天然牧草干草品质的影响,确定适宜刈割时间和晾晒时间对保存干草品质具有重要意义。在不同刈割时间(08:00h,12:00h,16:00h)对天然草地牧草进行刈割,刈割后在不同晾晒时间点(0h、2h、4h、6h、8h、10h、12h、24h、26h、28h、30h、36h、48h、72h)取样,进行常规营养成分分析。结果表明,08:00h、12:00h、16:00h刈割天然草地牧草晾晒72h后均达到安全含水量,可以打捆贮藏,刈割时间和晾晒时间的交互作用对天然牧草干草DM含量和CP含量影响差异显著(P<0.05),对天然牧草干草ADF含量、NDF含量、Ash含量的影响无显著差异(P>0.05)。同一天内,刈割越晚返潮作用越明显,营养物质流失越严重,应尽早刈割。由于光照作用,晾晒时间越长,营养流失越严重,达到安全含水量应尽快打捆,保障干草品质。刈割时间和晾晒时间的交互作用对天然牧草干草CP含量有显著影响,表明干草品质受刈割时间和晾晒时间双重影响。展开更多
Italian ray grass and oat are two grass species characterized by their ability to adjust tropical climate conditions. This study proposed to assess forage productivities to allow an appropriate mowing period determina...Italian ray grass and oat are two grass species characterized by their ability to adjust tropical climate conditions. This study proposed to assess forage productivities to allow an appropriate mowing period determination in their use as dairy female feed in Madagascar. A test on small plots has been set up in the southern part of the capital city Antananarivo during one dry period （4 months）. Live observations followed by laboratory proximate analyses have been performed for forage productivity and feeding value determination. Cultivated on tanety （hill）, irrigated in counter season, results show that： （I） oat higher height （H = 96.7 cm） than Italian ray grass （H= 69.4 cm） at 99 days of age; （2） similar biomass productivity; （3） dry matter yields significantly different （p = 0.05）; （4） certain similarity between dry matter yields and FMU （fodder milk unit） score evolution; （5） leafy stage of Italian ray grasses at 99 days of age; （6） mid-flowering stage for oats during the same period. Cell wall content, crude fiber and dry matter contents increased with age （p = 0.05）. Crude proteins and minerals evolved in opposite directions. Gross energy content did not present precise variation with age. This study allowed that for an acceptable quantitative and qualitative production during dry seasons, good mowing period for Italian ray grass could start at 76 days age, while oat could start being harvested at 68 days.展开更多
文摘刈割时间(Cutting time CT)和晾晒时间(Drying time DT)是影响干草品质的主要因素,收获期的研究已经取得长足进展,刈割时间和晾晒时间对天然牧草干草品质的影响还是空白,研究刈割时间和晾晒时间对天然牧草干草品质的影响,确定适宜刈割时间和晾晒时间对保存干草品质具有重要意义。在不同刈割时间(08:00h,12:00h,16:00h)对天然草地牧草进行刈割,刈割后在不同晾晒时间点(0h、2h、4h、6h、8h、10h、12h、24h、26h、28h、30h、36h、48h、72h)取样,进行常规营养成分分析。结果表明,08:00h、12:00h、16:00h刈割天然草地牧草晾晒72h后均达到安全含水量,可以打捆贮藏,刈割时间和晾晒时间的交互作用对天然牧草干草DM含量和CP含量影响差异显著(P<0.05),对天然牧草干草ADF含量、NDF含量、Ash含量的影响无显著差异(P>0.05)。同一天内,刈割越晚返潮作用越明显,营养物质流失越严重,应尽早刈割。由于光照作用,晾晒时间越长,营养流失越严重,达到安全含水量应尽快打捆,保障干草品质。刈割时间和晾晒时间的交互作用对天然牧草干草CP含量有显著影响,表明干草品质受刈割时间和晾晒时间双重影响。
文摘Italian ray grass and oat are two grass species characterized by their ability to adjust tropical climate conditions. This study proposed to assess forage productivities to allow an appropriate mowing period determination in their use as dairy female feed in Madagascar. A test on small plots has been set up in the southern part of the capital city Antananarivo during one dry period （4 months）. Live observations followed by laboratory proximate analyses have been performed for forage productivity and feeding value determination. Cultivated on tanety （hill）, irrigated in counter season, results show that： （I） oat higher height （H = 96.7 cm） than Italian ray grass （H= 69.4 cm） at 99 days of age; （2） similar biomass productivity; （3） dry matter yields significantly different （p = 0.05）; （4） certain similarity between dry matter yields and FMU （fodder milk unit） score evolution; （5） leafy stage of Italian ray grasses at 99 days of age; （6） mid-flowering stage for oats during the same period. Cell wall content, crude fiber and dry matter contents increased with age （p = 0.05）. Crude proteins and minerals evolved in opposite directions. Gross energy content did not present precise variation with age. This study allowed that for an acceptable quantitative and qualitative production during dry seasons, good mowing period for Italian ray grass could start at 76 days age, while oat could start being harvested at 68 days.
